Grab-bucket.



No. 831,089. PATEN'TED SEPT. 18, 1906. J. A. McGRBW GRAB BUCKET.

APPLICATION FILED AUG. 10, 1905.

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No. 831,089. PATENTED SEPT. 18, 1906.

J. A. MoGRBW.

GRAB BUCKET.

APPLICATION FILED AUG. 10, 1905.

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APPLIGATION FILED AUG. 10, 1905.

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UNITED s'rA i ns PATEnr OFFICE.

JOHN A. MCGREW, OF COLUMBUS, OHIO.

GRAB-BUCKET.

NO. 831,089. Specification of Letters Patent. Patented Sept. 18, 1906.

Application filed August 10, 1905. Serial No. 273,594.

The motors 5 work in contrary directions to operate the scoops in contrary directions. By employing independent motors, so that the chains may be operated in contrary directions, complicated gearing is avoided. The avoidance of complicated gearing, especially such as includes gear-wheels, inions, and racks, is very important in buc iets designed to operate upon coal and other dusty, loose, and hard materials, because such materials accumulate in the gearing and seriously interfere with the operation of the bucket.

The bucket is shown to be provided with a suitable bail 7, to which a hoisting rope or chain can be attached. The sides of the hood or frame can be strengthened by the addition of angle-bars 8 and 8 and an anglebar 9 can be secured to the side of the scoop to form stops limiting the upward movement of the scoops.

It will be observed that the structure on opposite sides of a center line, Fig. 1, is symmetrical, but the pocket or sprocket wheels 5 will be driven in opposite directions, so as to move the scoops in contrary directions that is to say, toward each other in closing and away from each other in opening.

In practice when a load is to be taken the scoops are made or allowed to assume the position indicated in Fig. 1. In this position the bucket is dropped onto the material to be taken, the points of the scoop penetrating it. The motors are then operated, and the effect is to first draw the points of-the scoops upward and then inward, with a slight tendency downward, due to the inclination of the tracks 1. This inward-and-downward movement of the scoop promotes the accumulation of the material in the scoop, an especially toward the outer end of it, and because the scoops are worked toward each other an abundance is gathered by the points of the scoops and held between the extensions 1 of the hood.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. In a grabbucket, the combination of a hood or frame, a pair of pivotal scoops facing each other, tracks or ways on which said scoops slide, said tracks or ways being inclined downward from their outer ends inward toward each other, and means for moving said scoops on said tracks or ways.

2. In a grab-bucket, the combination of a hood or frame, having downwardly-extend- To all wlumt it may concern: I

Be it known that I, JOHN A. h ICGREW, a l citizen of the United States, residing at O0- lumbus, in the county of Franklin and State l of Ohio, have invented certain new and useful Improvements in Grab-Buckets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide an improved construction of bucket for hoisting coal, iron ore, and other materials, the invention relating more particularly to what are termed grab-buckets.

The invention consists in the construction hereinafter described and claimed.

In the accompanying drawings, in which is shown but one embodiment of the invention, Figure 1 is a view in side. elevation, showing the scoops open. Fig. 2 is a similar view showing the scoops closed, but with a portion of the side of the frame or hood broken out to show interior details. Fig. 3 is an end view with the scoop closed. Fig. 4 is a similar view with portions of the frame and scoop broken out to disclose interior de tails.

In the views, 1 designates the frame or hood, having at the middle of its sides trianular extensions 1 Along the lower edges of the hood are secured I-bars forming tracks 1 upon which the scoops are supported and moved. These tracks 1 are inclined downward from the ends of the hood toward the center thereof. At the extreme ends of the tracks are stops 1.

2 designates the scoops or shovels, of which there are two. These scoops, so placed that their open sides face each other, are suspended upon the tracks 1 by means of loops 2 pivotally connected with the sides of the scoops, so

that the latter can be not only oscillated, but also slid or moved toward and from each other. Each scoop is furnished at its interior at about the middle point of its length with a bail 2 and connecting this bail and the outer end of the scoop is a chain 3. This chain is passed over an idler 4, journaled in a suitable bracket 4*, depending from the interior of the hood, thence over a pocket or sprocket-wheel 5 driven by a suitable motor 5, and finally over two guiding-idlers 6 and 6 to the outer end of the scoop, where it is attached in a suitable manner.

ing wings made with inclined edges, a pair of pivotal scoops facing each other, tracks or ways on which said scoops slide downward toward and upward from each other and means for moving said scoops.

3. In a grab-bucket, the combination of a hood or frame, a pair of pivotal scoops hung slidingly on said frame, chains or cords connecting the inner and outer sides of said scoops and motors on said hood adapted to work in contrary directions for operating said chains and therefore the scoops in contrary directions.

4. In a grab-bucket, the combination of a hood or frame, a pair of pivotal scoops hung I5 slidlngly on said frame, a chain or cord conor frame adapted to work in contrary directions for operating said chains or cords and therefore the scoops in contrary 2o JOHN A. MoGREW. Witnesses U. R. PETERS, H. D. BROWNING. 

